Trane Gas Furnaces: TUH1/TDH1 Re: Furnace Lockout Codes / Diagnostic Codes INTEGRATED FURNACE CONTROL - ERROR CODES Flashing Slow Normal - No call for heat Flashing Fast Normal - Call for heat On Replace Control Off Check Power 2 Flashes Lockout...

Gas Furnace: TUH1/TDH1 Re: Furnace Operating Noarmally The customer claims that there is a heating problem, but you find the furnace running normally. CHECKOUT: 1. Fault Recall Disable all thermostat inputs. Press the "Fault Recall" button for 2-3 seconds to check for any stored...